Email from Tom
Hi Russ
I am not in the lab today but I have just spoken to Dr Djennati on routine
call a few moments ago.
Yes, there has been some delay but we are now very close; there is one
remaining filtering oscillation issue (minor) that is being addressed by
adjustments to an RC circuit. The analogue and digital circuits are
otherwise complete, with all the data acquisition in place. Then we will be
just about ready to progress to testing , and can already see the beads in a
low concentration sample we had previously used, so that's like for like.
It's early days but we appear to have (as of today), at first glance, around
2.5 times the output from that same sample c.f. the old circuit, with far
less noise, and that's even before we put it on batteries in a shielding box
(which will further improve things). So it's looking good technically and we
believe (for confirmation by a third party) that we were actually detecting,
on the previous electronics, far fewer beads than we had previously
calculated, which also appears to be good news.
I apologise for time this is taking but it's not an easy endeavour.
Regards
Tom
